CN109186825B - Optical fiber macrobend pressure sensor and measuring system thereof - Google Patents
Optical fiber macrobend pressure sensor and measuring system thereof Download PDFInfo
- Publication number
- CN109186825B CN109186825B CN201810906130.XA CN201810906130A CN109186825B CN 109186825 B CN109186825 B CN 109186825B CN 201810906130 A CN201810906130 A CN 201810906130A CN 109186825 B CN109186825 B CN 109186825B
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- hole
- macrobend
- pressure sensor
- reserved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 169
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 230000007797 corrosion Effects 0.000 claims abstract description 8
- 238000005260 corrosion Methods 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 10
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
Abstract
The invention discloses an optical fiber macrobend pressure sensor and a measuring system thereof. The sensor comprises a shell, an elastic diaphragm, a support, a sleeve, a dowel bar, an optical fiber, an incident optical fiber through hole and an emergent optical fiber through hole. The bottom of the shell is fixedly provided with an elastic diaphragm, the inside of the shell is fixedly provided with a support for fixing the sleeve, and the top of the shell is provided with an incident optical fiber through hole; the dowel bar penetrates through the sleeve, one end of the dowel bar is fixed on the center of the elastic diaphragm, and the other end of the dowel bar is fixedly connected with the emergent optical fiber through hole; the optical fiber penetrates through the incident optical fiber through hole and the emergent optical fiber through hole to form an optical fiber macrobend section; the sensor and the measuring system thereof adopt an elastic diaphragm and optical fiber macrobend combined structure and a photodiode for converting optical signals into electric signals to realize the measurement of pressure. The optical fiber macrobend pressure sensor provided by the invention has the advantages of simple structure, easiness in processing, low price, intrinsic safety and corrosion resistance, and has wide application prospects in the fields of petrochemical industry, civil water conservancy, aerospace and the like.
Description
Technical Field
The invention relates to the technical field of pressure sensors and optical fiber sensing, in particular to an optical fiber macrobend pressure sensor and a measuring system thereof.
Background
The optical fiber sensor is a sensing technology which is rapidly developed along with the development of an optical fiber communication technology, and has the advantages of small size, light weight, high sensitivity, intrinsic safety, electromagnetic interference resistance, corrosion resistance, long service life and the like. Through a proper modulation and demodulation method, the optical fiber sensor can realize measurement and long-term on-line monitoring of multiple physical quantities and parameters such as temperature, pressure, strain, acceleration, displacement, flow, electric field, magnetic field and the like, thereby obtaining wide research and application.
Under severe environments (such as oil and gas wells, oil and gas pipes and other places) such as high temperature, high pressure, corrosion, flammability, explosiveness, strong electromagnetic interference and the like, electronic pressure sensors usually have unsafe factors, cannot work safely and reliably for a long time, and are difficult to transmit measurement signals in a long distance. The optical fiber pressure sensor overcomes the defects of an electronic pressure sensor, has the advantages of intrinsic safety, corrosion resistance, electromagnetic interference resistance, long signal transmission distance, easiness in realizing long-term online monitoring of pressure and the like, and is very suitable for being applied in severe environments.
The existing optical fiber pressure sensor mainly adopts an optical fiber grating type and an optical fiber Fabry-Perot interference type. Most of the two types of pressure sensors utilize the central displacement generated by the elastic diaphragm under the action of pressure, and the change of the central displacement of the diaphragm is converted into the axial strain of the fiber bragg grating or the change of the length of the fiber Fabry-Perot cavity through a specific physical quantity conversion mechanism, so that the measurement and the monitoring of the pressure are realized. At present, a fiber bragg grating pressure sensor, a lever-type fiber bragg grating pressure sensor and an all-fiber high-sensitivity pressure sensor exist, but the fiber bragg grating pressure sensor has temperature-pressure cross sensitivity, measurement results are easily influenced by temperature, temperature compensation is needed, the structural complexity of the sensor is increased, the fiber fabry-perot interference type pressure sensor also needs temperature compensation, the cavity sealing process requirement is strict, and the yield is low. In summary, the two types of optical fiber pressure sensors have complex structures, high cost and expensive modulation and demodulation equipment, and are difficult to popularize and apply.
Disclosure of Invention
The invention aims to provide an optical fiber macro-bending pressure sensor and a measuring system thereof, which have the advantages of simple structural form, easy processing, simple modulation and demodulation method and low price by utilizing the excellent characteristics of the optical fiber macro-bending sensing technology and adopting an elastic membrane and optical fiber macro-bending combined structure.
In order to achieve the purpose, the invention provides the following scheme:
an optical fiber macrobend pressure sensor, comprising: the device comprises a shell, an elastic diaphragm, a support, a sleeve, a dowel bar, an optical fiber, an incident optical fiber through hole and an emergent optical fiber through hole;
the elastic diaphragm is fixedly arranged at the bottom of the shell, the support is fixedly arranged in the shell to fix the sleeve, and the incident optical fiber through hole is formed in the top of the shell;
the dowel bar penetrates through the sleeve, one end of the dowel bar is fixed on the center of the elastic diaphragm, and the other end of the dowel bar is fixedly connected with the emergent optical fiber through hole;
the optical fiber sequentially penetrates through the incident optical fiber through hole and the emergent optical fiber through hole, so that an optical fiber macrobend section is formed between the incident optical fiber through hole and the emergent optical fiber through hole.
Optionally, the shell is further provided with a first reserved through hole and a second reserved through hole; the first reserved through hole and the incident optical fiber through hole are on the same horizontal line; the second reserved through hole and the emergent optical fiber through hole are on the same horizontal line; the optical fiber penetrates through the first reserved through hole to enter the shell; the optical fiber exits the housing through the second reserved through hole.
Optionally, the incident optical fiber through hole, the emergent optical fiber through hole, the dowel bar and the sleeve are all arranged along the central axis of the shell.
Optionally, the housing is a closed cylindrical structure.
Optionally, the elastic membrane is of a circular structure.
Optionally, the elastic diaphragm, the dowel bar and the shell are made of corrosion-resistant materials.
Optionally, the housing is made of stainless steel, aluminum alloy or other high-strength polymer.
Optionally, the elastic diaphragm and the dowel bar are made of stainless steel or aluminum alloy.
The invention also provides a measuring system of the optical fiber macrobend pressure sensor, which comprises a light source, a photodiode, a signal conditioning circuit, a computer and the optical fiber macrobend pressure sensor;
an incident optical fiber of the optical fiber macrobend pressure sensor penetrates through the first reserved through hole to be connected with the light source; an emergent optical fiber of the optical fiber macrobend pressure sensor penetrates through the second reserved through hole to be connected with the input end of the photodiode; the output end of the photodiode is electrically connected with the computer through the signal conditioning circuit; the incident optical fiber of the optical fiber macrobend pressure sensor is an optical fiber between the incident optical fiber through hole and the first reserved through hole, and the emergent optical fiber of the optical fiber macrobend pressure sensor is an optical fiber between the emergent optical fiber through hole and the second reserved through hole; the photodiode converts an optical signal into a voltage signal.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides an optical fiber macrobend pressure sensor and a measuring system thereof, wherein the optical fiber macrobend pressure sensor and the measuring system thereof comprise: the device comprises a shell, an elastic diaphragm, a support, a sleeve, a dowel bar, an optical fiber macrobend section, an incident optical fiber through hole, an emergent optical fiber through hole, a photodiode and the like. The central displacement of elastic diaphragm production under the pressure effect passes through the dowel steel and turns into the radius variable quantity of the optical fiber macrobend section for light signal produces the light intensity loss at the optical fiber macrobend section, turns into the light signal through photodiode, realizes the measurement to pressure.
Compared with the prior art, the invention adopts the combined structure of the elastic membrane and the optical fiber macrobend, and the components are cheap and easy to obtain, so that the invention has the advantages of simple structure form and easy processing; the shell is a sealing device, so that the sensor has good corrosion resistance to severe environment; the sensor of the invention adopts a light intensity modulation and demodulation method, and can realize the demodulation of signals only by a light source and a photodiode, so that the sensor has the advantages of simple modulation and demodulation method, less signal processing amount and low price.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an optical fiber macrobend pressure sensor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a measurement system of an optical fiber macrobend pressure sensor according to an embodiment of the invention.
Wherein: 1. a sleeve; 2. a dowel bar; 3. an elastic diaphragm; 4. a support; 5. a housing; 6. a macro-bending section of the optical fiber; 7. an incident optical fiber through hole; 8. an incident optical fiber; 9-1, a first reserved through hole; 9-2, second reserved through holes; 10. an outgoing fiber through hole; 11. an outgoing optical fiber; 12. a light source; 13. an optical fiber macrobend pressure sensor; 14. a photodiode; 15. a signal conditioning circuit; 16. and (4) a computer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an optical fiber macro-bending pressure sensor and a measuring system thereof, which have the advantages of simple structural form, easy processing, simple modulation and demodulation method and low price, by utilizing the excellent characteristics of the optical fiber macro-bending sensing technology and adopting an elastic membrane and optical fiber macro-bending combined structure.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of an optical fiber macrobend pressure sensor according to an embodiment of the present invention, and as shown in fig. 1, the optical fiber macrobend pressure sensor according to the embodiment of the present invention includes: the optical fiber sensor comprises a shell 5, an elastic diaphragm 3, a support 4, a sleeve 1, a dowel bar 2, an optical fiber, an incident optical fiber through hole 7 and an emergent optical fiber through hole 10.
The bottom of the shell 5 is fixedly provided with an elastic membrane 3, the inside of the shell 5 is fixedly provided with the support 4 for fixing the sleeve 1, and the top of the shell 5 is provided with the incident optical fiber through hole 7.
The dowel bar 2 penetrates through the sleeve 1, one end of the dowel bar 2 is fixed on the center of the elastic diaphragm 3, and the other end of the dowel bar 2 is fixedly connected with the emergent optical fiber through hole 10.
The optical fiber sequentially penetrates through the incident optical fiber through hole 7 and the emergent optical fiber through hole 10, so that the optical fiber forms an optical fiber macrobend section 6 between the incident optical fiber through hole 7 and the emergent optical fiber through hole 10.
The shell is also provided with a first reserved through hole 9-1 and a second reserved through hole 9-2; the first reserved through hole 9-1 and the incident optical fiber through hole 10 are on the same horizontal line; the second reserved through hole 9-2 and the emergent optical fiber through hole 10 are on the same horizontal line; the optical fiber passes through the first reserved through hole 9-1 and enters the shell; the optical fibre exits the housing through the second reserved through hole 9-2.
The incident optical fiber through hole 7, the emergent optical fiber through hole 10, the dowel bar 2 and the sleeve 1 are all arranged along the central axis of the shell 5.
The optical fiber between the incident optical fiber through hole 7 and the first reserved through hole 9-1 is an incident optical fiber 8 of the optical fiber macrobend pressure sensor; and the optical fiber between the emergent optical fiber through hole 10 and the second reserved through hole 9-2 is an emergent optical fiber 11 of the optical fiber macrobend pressure sensor.
Preferably, the housing 5 is a closed cylindrical structure. The elastic membrane 3 is of a circular structure.
Preferably, the elastic diaphragm 3, the dowel bar 2 and the shell 5 are all made of corrosion-resistant materials.
Preferably, the material of the housing 5 is stainless steel, aluminum alloy or other high-strength polymers. The elastic diaphragm 3 and the dowel bar 2 are made of stainless steel or aluminum alloy.
The working principle of the optical fiber macrobend pressure sensor provided by the invention is as follows: under the action of pressure, the center of the elastic diaphragm 3 generates displacement and is transmitted to the emergent optical fiber through hole 10 through the dowel bar 2, so that the radius of the optical fiber macrobend section 6 is changed, the light intensity loss of a light signal at the optical fiber macrobend section 6 is changed, and the pressure is measured.
In this embodiment, the optical fiber macrobend pressure sensor provided by the invention can change the measuring range, the precision and the sensitivity by changing the thickness and the radius of the elastic diaphragm 3 according to the requirement of the measuring environment, and can also be realized by changing the initial radius of the optical fiber macrobend section 6, so that the application of the optical fiber macrobend pressure sensor is wider.
Fig. 2 is a schematic structural diagram of a measurement system of an optical fiber macrobend pressure sensor according to an embodiment of the present invention, and as shown in fig. 2, an embodiment of the present invention provides a measurement system of an optical fiber macrobend pressure sensor, where the measurement system includes a light source 12, a photodiode 14, a signal conditioning circuit 15, a computer 16, and an optical fiber macrobend pressure sensor 13. An incident optical fiber 8 of the optical fiber macrobend pressure sensor 13 passes through the first reserved through hole 9-1 to be connected with the light source 12; an emergent optical fiber 11 of the optical fiber macrobend pressure sensor 13 penetrates through the second reserved through hole 9-2 to be connected with the input end of the photodiode 14; the output end of the photodiode 14 is electrically connected with the computer 16 through the signal conditioning circuit 15; wherein the photodiode 14 converts the optical signal into a voltage signal.
The light emitted by the light source 12 is transmitted to the optical fiber macrobend section 6 through the incident optical fiber 8; under the action of pressure, the radius of the optical fiber macrobend section 6 is changed, so that the loss of an optical signal is changed; the light with the pressure signal enters the photodiode 14 through the outgoing optical fiber 11, and the light signal is converted into a voltage signal and transmitted to the computer 16 through the signal conditioning circuit 15.
The optical fiber macrobend pressure sensor for measuring pressure of the present invention is further explained by theoretical analysis.
The invention adopts a combined structure of the elastic membrane and the optical fiber macrobend, the central displacement generated by the elastic membrane under the action of pressure is converted into the radius variable quantity of the optical fiber macrobend section through the force transmission rod, so that the optical signal generates light intensity loss at the optical fiber macrobend section, and the optical signal is converted into an electric signal through the photodiode, thereby realizing the measurement of the pressure.
The circular elastic diaphragm satisfies the peripheral fixing and supporting condition, and the center thereof is displaced by y under the action of pressure PcComprises the following steps:
in the formula, E, alpha, mu and t are respectively the elastic modulus, radius, Poisson ratio and thickness of the elastic membrane.
According to the geometrical relation, the center of the elastic diaphragm is displaced by ycThe relation with the radius R of the optical fiber macrobend section is as follows:
yc＝2R (2)。
meanwhile, in the bent optical fiber, the relation between the light intensity loss 2 alpha and the radius R of the macro-bending section of the optical fiber is as follows:
where r is the fiber core radius, betagAnd gamma, kappa and V are propagation constants and waveguide numbers.
By substituting the formulas (1) and (2) into the formula (3), the theoretical relation between the light intensity loss of the macro-bending section of the optical fiber and the pressure applied to the elastic diaphragm can be obtained as follows:
in fact, since the remaining parameters are constants, the above equation is further simplified as:
in the formula
Both are constants that can be obtained by fitting experimental data. A variation curve of the light intensity loss corresponding to the pressure is obtained through a calibration experiment, and the current pressure value can be obtained by reading the variation of the light intensity loss.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. An optical fiber macrobend pressure sensor, comprising: the device comprises a shell, an elastic diaphragm, a support, a sleeve, a dowel bar, an optical fiber, an incident optical fiber through hole and an emergent optical fiber through hole;
the elastic diaphragm is fixedly arranged at the bottom of the shell, the support is fixedly arranged in the shell to fix the sleeve, and the incident optical fiber through hole is formed in the top of the shell; the shell is of a closed cylindrical structure;
the dowel bar penetrates through the sleeve, one end of the dowel bar is fixed on the center of the elastic diaphragm, and the other end of the dowel bar is fixedly connected with the emergent optical fiber through hole;
the optical fiber sequentially penetrates through the incident optical fiber through hole and the emergent optical fiber through hole, so that an optical fiber macrobend section is formed between the incident optical fiber through hole and the emergent optical fiber through hole by the optical fiber; the incident optical fiber through hole, the emergent optical fiber through hole, the dowel bar and the sleeve are all arranged along the central axis of the shell;
the change of the measuring range, the precision and the sensitivity is realized by changing the thickness and the radius of the elastic diaphragm or changing the initial radius of the optical fiber macro-bending section according to the requirements of the measuring environment.
2. The optical fiber macrobend pressure sensor according to claim 1, wherein the housing is further provided with a first reserved through hole and a second reserved through hole; the first reserved through hole and the incident optical fiber through hole are on the same horizontal line; the second reserved through hole and the emergent optical fiber through hole are on the same horizontal line; the optical fiber penetrates through the first reserved through hole to enter the shell; the optical fiber exits the housing through the second reserved through hole.
3. The fiber optic macrobend pressure sensor of claim 1, wherein the elastic diaphragm is of a circular configuration.
4. The optical fiber macrobend pressure sensor according to claim 1, wherein the elastic diaphragm, the dowel bar and the housing are made of corrosion-resistant materials.
5. The optical fiber macrobend pressure sensor according to claim 4, wherein the material of the housing is stainless steel, aluminum alloy or other high-strength polymer.
6. The optical fiber macrobend pressure sensor according to claim 4, wherein the elastic diaphragm and the dowel bar are made of stainless steel or aluminum alloy.
7. A measurement system of an optical fiber macrobend pressure sensor, which is characterized by comprising a light source, a photodiode, a signal conditioning circuit, a computer and the optical fiber macrobend pressure sensor as claimed in any one of claims 1 to 6;
an incident optical fiber of the optical fiber macrobend pressure sensor passes through the first reserved through hole to be connected with the light source; the emergent light fiber of the optical fiber macrobend pressure sensor passes through a second reserved through hole to be connected with the input end of the photodiode; the output end of the photodiode is electrically connected with the computer through the signal conditioning circuit; the incident optical fiber of the optical fiber macrobend pressure sensor is an optical fiber between the incident optical fiber through hole and the first reserved through hole, and the emergent optical fiber of the optical fiber macrobend pressure sensor is an optical fiber between the emergent optical fiber through hole and the second reserved through hole; the photodiode converts an optical signal into a voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906130.XA CN109186825B (en) | 2018-08-10 | 2018-08-10 | Optical fiber macrobend pressure sensor and measuring system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810906130.XA CN109186825B (en) | 2018-08-10 | 2018-08-10 | Optical fiber macrobend pressure sensor and measuring system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109186825A CN109186825A (en) | 2019-01-11 |
| CN109186825B true CN109186825B (en) | 2021-02-02 |
Family
ID=64920828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810906130.XA Active CN109186825B (en) | 2018-08-10 | 2018-08-10 | Optical fiber macrobend pressure sensor and measuring system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109186825B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110367955A (en) * | 2019-08-19 | 2019-10-25 | 深圳市矽赫科技有限公司 | Fibre optical sensor and detection device for vital signs |
| CN115153462B (en) * | 2022-06-10 | 2023-07-14 | 中国人民解放军总医院第一医学中心 | Human body characteristic acquisition device, monitoring device, system, method and equipment |
| CN115420208B (en) * | 2022-11-04 | 2023-03-24 | 之江实验室 | Texture sensor based on optical fiber knot sensitive structure and elastic shifting piece |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4947693A (en) * | 1987-07-28 | 1990-08-14 | Grumman Aerospace Corporation | Discrete strain sensor |
| US5222165A (en) * | 1992-05-29 | 1993-06-22 | Bohlinger J Jerry | Optical fiber elastomeric switch device |
| JPH11223513A (en) * | 1998-02-09 | 1999-08-17 | Hitachi Zosen Corp | Strain measuring device |
| JP2002168608A (en) * | 2000-12-05 | 2002-06-14 | Mitsubishi Heavy Ind Ltd | Optical fiber sensor and strain-measuring method using the same |
| CN2529268Y (en) * | 2001-11-05 | 2003-01-01 | 鸿富锦精密工业（深圳）有限公司 | Ring type fixed light attenuator |
| CN101065652A (en) * | 2004-09-28 | 2007-10-31 | 澳大利亚联邦 | Opto-acoustic pressure sensor |
| CN101871791A (en) * | 2010-06-30 | 2010-10-27 | 中国人民解放军国防科学技术大学 | Multi-parameter sensor and measurement system based on photonic crystal fiber |
| CN104330032A (en) * | 2014-07-09 | 2015-02-04 | 国家电网公司 | Fiber displacement sensor, fiber displacement detection device and fiber for sensor |
| CN104838298A (en) * | 2012-12-05 | 2015-08-12 | 住友电气工业株式会社 | Light guide channel and optical fiber transmission system |
| CN105683730A (en) * | 2013-10-25 | 2016-06-15 | 光纳株式会社 | Fiber optic biodiagnostic sensor system and vascular insertion type device for measuring pressure distribution |
| CN205907543U (en) * | 2013-06-19 | 2017-01-25 | 福伊特专利有限公司 | Roller |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8828505D0 (en) * | 1988-12-07 | 1989-01-11 | Bicc Plc | Optical fibre monitoring |
| CN1061439C (en) * | 1996-05-15 | 2001-01-31 | 南京航空航天大学 | Optical fibre minor bend sensor |
| CN101922989A (en) * | 2010-07-13 | 2010-12-22 | 西安金和光学科技有限公司 | Fiber pressure sensing device based on C-shaped spring tube |
| CN103392136B (en) * | 2010-12-02 | 2018-02-02 | Ofs飞泰尔公司 | DFB optical-fiber lasers bend sensor and optical heterodyne microphone |
| CN103674085B (en) * | 2013-12-16 | 2016-08-17 | 西安电子科技大学 | The sapphire fiber grating temperature of a kind of U-shape structure and the preparation method of strain gauge |
| CN104034456B (en) * | 2014-04-15 | 2016-04-13 | 南昌大学 | The optical fiber macrobend anamorphoser of adjustable bending radius |
| CN205593683U (en) * | 2016-03-18 | 2016-09-21 | 盐城师范学院 | Optic fibre pressure sensor |
-
2018
- 2018-08-10 CN CN201810906130.XA patent/CN109186825B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4947693A (en) * | 1987-07-28 | 1990-08-14 | Grumman Aerospace Corporation | Discrete strain sensor |
| US5222165A (en) * | 1992-05-29 | 1993-06-22 | Bohlinger J Jerry | Optical fiber elastomeric switch device |
| JPH11223513A (en) * | 1998-02-09 | 1999-08-17 | Hitachi Zosen Corp | Strain measuring device |
| JP2002168608A (en) * | 2000-12-05 | 2002-06-14 | Mitsubishi Heavy Ind Ltd | Optical fiber sensor and strain-measuring method using the same |
| CN2529268Y (en) * | 2001-11-05 | 2003-01-01 | 鸿富锦精密工业（深圳）有限公司 | Ring type fixed light attenuator |
| CN101065652A (en) * | 2004-09-28 | 2007-10-31 | 澳大利亚联邦 | Opto-acoustic pressure sensor |
| CN101871791A (en) * | 2010-06-30 | 2010-10-27 | 中国人民解放军国防科学技术大学 | Multi-parameter sensor and measurement system based on photonic crystal fiber |
| CN104838298A (en) * | 2012-12-05 | 2015-08-12 | 住友电气工业株式会社 | Light guide channel and optical fiber transmission system |
| CN205907543U (en) * | 2013-06-19 | 2017-01-25 | 福伊特专利有限公司 | Roller |
| CN105683730A (en) * | 2013-10-25 | 2016-06-15 | 光纳株式会社 | Fiber optic biodiagnostic sensor system and vascular insertion type device for measuring pressure distribution |
| CN104330032A (en) * | 2014-07-09 | 2015-02-04 | 国家电网公司 | Fiber displacement sensor, fiber displacement detection device and fiber for sensor |
Non-Patent Citations (2)
| Title |
|---|
| Design of a multi-layered optical bend loss sensor for pressure and shear sensing;Liu C S , Kundu T , Chou G W , et al.;《Proceedings of SPIE - The International Society for Optical Engineering,》;20071231;全文 * |
| 一种高灵敏度光纤光栅压力传感器;谭波;《光电子.激光》;20121115;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109186825A (en) | 2019-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109186825B (en) | Optical fiber macrobend pressure sensor and measuring system thereof | |
| CN101995485B (en) | Target fiber grating rheometer | |
| Zhang et al. | Optical fiber liquid level sensor based on macro-bending coupling | |
| CN203163913U (en) | Diaphragm type fiber bragg grating pressure sensor with temperature compensation | |
| CN102865900A (en) | FBG (Fiber Bragg Grating) liquid level sensor and preparation method thereof | |
| CN104316106A (en) | Optical fiber sensor based on Mach-Zehnder interference and fiber bragg grating | |
| Zhang et al. | High sensitivity optical fiber liquid level sensor based on a compact MMF-HCF-FBG structure | |
| CN101298980A (en) | Design method and manufacturing technique of high-sensitivity temperature self-compensation optical fiber grating strain sensor | |
| CN203191143U (en) | Fiber grating sensor used for measuring pressure of liquid | |
| Oliveira et al. | Intensity liquid level sensor based on multimode interference and fiber Bragg grating | |
| Ran et al. | Design and demonstration of a liquid level fiber sensor based on self-imaging effect | |
| EP3311130A1 (en) | Fiber optic pressure apparatus, methods, and applications | |
| CN105387968A (en) | Optical fiber cladding surface Bragg grating temperature self-compensating pressure sensor | |
| CN208818367U (en) | A kind of fiber grating temperature sensor | |
| CN102980615B (en) | Optical fiber vortex shedding flowmeter | |
| Pachava et al. | Fiber Bragg grating–based hydraulic pressure sensor with enhanced resolution | |
| Deng et al. | Twisted tapered plastic optical fibers for continuous liquid level sensing | |
| CN109163843B (en) | Fiber grating pressure sensor with controllable pre-stretching function | |
| Zhang et al. | Numerical and experimental studies of high-sensitivity plug-in pressure sensor based on fiber Bragg gratings | |
| Ji et al. | High-resolution fiber grating pressure sensor with in-situ calibration for deep sea exploration | |
| CN114137450A (en) | Magnetofluid-filled fiber optic magnetic field and displacement sensor | |
| CN107063393A (en) | A kind of level sensor system based on single mode multimode single-mode fiber structure and Bragg grating | |
| Yang et al. | Research on a fiber Bragg grating hydrostatic level based on elliptical ring for settlement deformation monitoring | |
| Ch et al. | A diaphragm based fiber Bragg grating (FBG) type pressure sensor for ocean applications | |
| CN103134632A (en) | Fiber grating pressure sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |